Curtail vs Optimizilla

Curtail is a free Linux application for compressing PNG, JPEG, WebP, and SVG images. It offers both compression modes and lets users decide whether image metadata is retained. Recursive directory compression supports batch processing across folder contents. When compression would produce a larger file, Curtail restores the original. Actions are provided to open a compressed image and reveal it in its folder. The project is released under the GNU General Public License version 3 or later and uses open-source components including Oxipng, pngquant, Jpegoptim, libwebp, and Scour. The project recommends installing its Flatpak package from Flathub; unofficial Snap, Ubuntu PPA, and Fedora COPR packages are also listed. Flathub marks the app as potentially unsafe and lists read/write access to the home folder. The GNOME page lists version 1.17.0, released on 2026-10-05, and links to an issue tracker. Curtail is available at no cost, with no trial required.

Optimizilla is a web image-compression tool for JPEG, PNG, WebP, GIF, and SVG files. It processes images in the browser, supports batch work, and lets users adjust quality and preview the result before saving. The compressor uses format-specific handling: JPEG quality is inferred from quantization tables with a default target of 80; PNG files become PNG8 with up to 256 colors while preserving transparency; and animated GIF optimization reduces the palette while retaining frames. Compressed images have EXIF, GPS, and camera metadata removed. The site says files are not uploaded to its servers. Its free plan is free, with no registration, daily limit, or watermark, and is described as allowing unlimited compression. The pricing page also lists a 25 MB maximum file size and batches of up to 50 files for Free. Pro costs $9 a month and includes unlimited file size and batch uploads, among other tools. Enterprise pricing is custom and not listed; its plan includes custom integrations, without naming partners.